#define _CRT_SECURE_NO_WARNINGS 1

#include<stdio.h>

int main()
{
	int arr[3] = { 0 };
	int i = 0;

	for (i = 0; i < 3; i++)
		scanf("%d", &arr[i]);
	i = 0;

	int a = 0;
	
	a = arr[i] + arr[i + 1] + arr[i + 2];

	printf("%d ", a);
	return 0;
}